Everyone wants to get something for nothing - whether it's a lucky upgrade that means you can turn left when you get on a plane instead or heading off into the economy seats, or even getting a few extra features thrown in for free when you buy a new car.

As some of the sharpest businesses around, no-one understands this quite as well as casinos and that's why they all have a system that they call comps. It's short for "complimentary offers" and these are special treats specially designed to reward you for your loyalty to the casino in question. They're basically bonuses.

Performers are seen as a 90-year old spruce tree cut down in the woods of the Shchyolkovsky District in Moscow Region, Russia on December 16, 2021 is sent to Moscow. The almost 28-metre high tree will be put up at the Moscow Kremlin's Sobornaya (Cathedral) Square this New Year and Christmas. (Photo by Vasily Fedosenko/TASS)

A girl from the Tharu community takes part in a ritual during the Shama Chakewa festival to honor the relationship between brothers and sisters in Kathmandu on November 8, 2022. (Photo by Skanda Gautam/ZUMA Press Wire/Rex Features/Shutterstock)

A runner takes part in the International World's coldest marathon at minus 53 degrees (–63.4 Fahrenheit) near Oymyakon, the republic of Sakha, also known as Yakutia, Russian Far East, Saturday, January 22, 2022. Sixty five runners, including athletes from the United Arab Emirates, United States and Belarus, started the run at extremely low temperature in Oymyakon, Yakutia's Pole of Cold. The international team of men and women ran full distance and half-marathon. (Photo by Ivan Nikiforov/AP Photo)

Andrea Ramirez of Colombia, left, and Virginia Dellan of Venezuela, right, compete during their women's - 49kg Taekwondo final match of the Bolivarian Games in Valledupar, Colombia, Sunday, July 3, 2022. Ramirez won the gold medal. (Photo by Fernando Vergara/AP Photo)

In this December 8, 2020 file photo, Venezuela's President Nicolas Maduro playfully sprays a journalist with disinfectant as he exits a press conference at Miraflores Presidential Palace in Caracas, Venezuela, amid the new coronavirus pandemic. Attorneys for the cash-strapped government blame the impact of U.S. sanctions for its inability to make an initial $18 million down payment to the United Nations for doses of the U.N.-supplied vaccines, whose deadline has already passed. (Photo by Matias Delacroix/AP Photo/File)

Singer Katie Gavin of American indie pop band MUNA performs onstage at the 2023 Coachella Valley Music and Arts Festival on April 14, 2023 in Indio, California. (Photo by Emma McIntyre/Getty Images for Coachella)

Cast members Chase Sui Wonders, Sarah Pidgeon, Gabriella Bechtel, also known as Gabbriette, and Madelyn Cline attend the premiere of the film “I Know What You Did Last Summer”, in Los Angeles on July 15, 2025. (Photo by Mario Anzuoni/Reuters)